Network Time Protocol Daemon (ntpd) read_mru_list() Remote DoS

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote NTP server is affected by a denial of service
vulnerability.

Description :

The remote NTP server is affected by a denial of service vulnerability
due to improper validation of mrulist queries. An unauthenticated,
remote attacker can exploit this, via a specially crafted NTP mrulist
query packet, to terminate the ntpd process.

Note that the NTP server is reportedly affected by additional
vulnerabilities as well; however, Nessus has not tested for these.

See also :

http://support.ntp.org/bin/view/Main/NtpBug3082
http://nwtime.org/ntp428p9_release/

Solution :

Upgrade to NTP version 4.2.8p9 or later.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 6.4
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Misc.

Nessus Plugin ID: 95389 ()

Bugtraq ID: 94448

CVE ID: CVE-2016-7434

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